![]() The example I link to uses Python's regex engine to tokenize and then the emoji package for the database, but Rust is a good example of a language where iterating grapheme clusters is quick and easy via a crate like unicode-segmentation.)Īndroid fonts are not rich as you may expect.įont files don't have these exotic glyph and Android has a hack for few characters without glyph. (A grapheme cluster is a base glyph plus all the diacritics and other modifiers which make up the visible character. Iterate through the grapheme clusters and discard any which contain recognized emoji codepoints. ![]() Directly use a manually-maintained regex which matches the blocks where the newest version of Unicode puts its emoji and their modifiers.(Yes, for those who missed it, the standard does call for the contents of to be plain text aside from the ampersand escapes and the browsers I tested all interpret tags within as literal text.) If you're putting a user-provided string into a element, filter out the emoji along with any bold/italic/underline/etc. I don't like fake icons in my browser tabs): However, this won't work unless CSS actually gets applied, so I'll give a second option which is more reliable in elements than the Unicode variation selector (I'm looking at you GitHub. still, it's useful for situations where you're either going to be making the whole thing a hyperlink or disallowing rich markup within it. You can't override a parent element's filter in a child, so this technique can't be used to grayscale a paragraph, then re-colorize the links within it. (I use them to grayscale PNG-format "link type" icons on hyperlinks that have been modified to point to the Wayback Machine.) Unlike the variation selector, it shouldn't matter how the emoji are rendered, because CSS filters apply to everything. } You've now got emoji display on □lockdown□. ![]()
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